diff --git a/config.go b/config.go
index f45136b..841cd93 100644
--- a/config.go
+++ b/config.go
@@ -38,7 +38,7 @@ type Config struct {
 
 func addDefaultEnvs(c *Config, path string) {
 	c.Env["SMUG_SESSION"] = c.Session
-	c.Env["SMUG_SESSION_NAME"] = c.Session
+	c.Env["SMUG_SESSION_CONFIG_PATH"] = path
 }
 
 func EditConfig(path string) error {
diff --git a/main.go b/main.go
index 02a6d2f..e004004 100644
--- a/main.go
+++ b/main.go
@@ -87,15 +87,8 @@ func main() {
 	var configPath string
 	if options.Config != "" {
 		configPath = options.Config
-	} else if options.Project != "" {
-		configPath = filepath.Join(userConfigDir, options.Project+".yml")
 	} else {
-		s, err := tmux.SessionName()
-		if err != nil {
-			fmt.Fprintln(os.Stderr, err.Error())
-			os.Exit(1)
-		}
-		configPath = filepath.Join(userConfigDir, s+".yml")
+		configPath = filepath.Join(userConfigDir, options.Project+".yml")
 	}
 
 	switch options.Command {